Kaio Márcio de Almeida (born October 19, 1984) is a Brazilian swimmer who specializes in the butterfly.
He is also known by the reduced versions of his name: Kaio Márcio, Kaio Márcio de Almeida, Kaio Almeida, or Kaio de Almeida.
Almeida was nine years old when he began swimming in Esporte Clube Cabo Branco in João Pessoa.
He suffered from asthma attacks and began swimming for medical reasons, and under the influence of his father, José Márcio.
At the time, Almeida was nicknamed "Gordo" (fat), a nickname he lost at age 15 when he lost weight and began to train and compete regularly.
As of February 2015, he competes for the swimming team of Minas Tênis Clube.